Solid and fluid fuel furnace.



PATENTED NOV. 29, 1904.,

0. A. GIFFORD.

SOLID AND FLUID FUEL FURNACE.

APPLICATION FILED JULY 9, 1903.

N0 MODEL.

A ()0 app-m a lilo. 1776.053.

Swar

Patented November 29, 1904s.

a'rnnr l ment CHARLES A. Gll lEORD, OF AKRON, OHIO.

some also more FUEL. Fuentes.

siencrnrcarrou forming part of Letters patent-no. wanes, dated Novemberas, 190a.

Application filed July 9, 1903. Serial No. lii'lhQQQ. on model.)

fails recourse may be had to the ordinary common solid fuel.

The objects of my invention are to provide means whereby a furnacenormally burning solid fuel may be so adapted as to burn a fluid fuel;and another object of my invention is to so place a burner for burningfluid fuel that it Will in no wise disturb or interfere with thelire-pot wherein is normally burned solid fuel.

lit frequently happens in those communities where there exists largequantities of natural fluid fuel that it is the common fuel used bothfor heating and lighting, and where this fluid is conveyed to anyconsiderable distance from its natural supply it not infrequentlyhappens that the supply fails for some. cause or other, necessitatingareturn to the use of a solid fuel, and as a consequence it is verydesirable to have a furnace provided with means whereby either fuel maybe used, or both, if necessary, without either one interfering with theother.

To the accomplishment of the aforesaid objects my invention consists inthe peculiar and novel constructiom arrangement, and combination of thevarious parts hereinafter described, reference being; had to theaccompanying drawings, in which drawings similar referencenumeralsindicate like parts in the different figures.

lin the drawings, Figure l is a side elevation of a furnace with aportion of the outer casing broken away to better illustrate theinternal construction; Fig. 2, a section at the line not Fin. 1: Fin".3.. a longitudinal section the of my improved burner, and; Fig. i asection of Fig. 3 at the'line .lu the drawings, 1 represents the outerone of an ordinary furnace of any construction, this casing 1 being madeup of sections or cylinders of galvanized iron. which are held togetherby rings 2 at intervals, so that iffor any reason access is required tothe inside of a furnace it can be had by removing one of From theup? therings at the desiredpoint. per part of thisouter casmgextends tubes orregister-pipes 3, which lead to the registers in the apartment to beheated by the furnace.

Between this outer casing 1 and the stove or solid fuel is burned,

fire-pot 4, in which the is an air-space which formsa passage from thecold-air inlet (not shown) in the base por tion of the casing,fromrwhich it rises around the heated lire-pot and through anyauxiliary.

heating devices which are used to increase the superficial area of thesolid-fuelheating devices up and out through-the register-tubes 3.Within this space between the fire-pot 4,- and outer casing 1 I place afluid-fuel burner, which is best described and illustrated in Figs. 3and 4 and consists of a hollow box 5', having inwardly-projectingalternating battle-plates 6, and in the ply pipe? for the inlet of thefluid fuel. The upperportion of this pipe 7 is punctured with any numberof minuteopcnings for the escape of the fluid fuel. The bottom of thisbox or burner 5 is open and is wider than the outside of the inlet-pipe7 topermit of the upward flow of air into the burner to permit of thecomplete combustion of the fluid fuel.

The fluidfuel is supplied from a supplypipe 8 and, controlled by a cock9 and passes through a mixer 10 to permit of the mixing of atmosphericair with the fluid fuel.

From the upper end of the box or burner 5 extends an outlet-pipe 11 forthe products of combustion produced by the burning of the,

fluid fuel to pass away. in order to save all the heat that can be savedfrom'the burner, ll customarily pass the exit-pipes 11 out through theregisterrpipes 3 to the chimney 12, which is also the chimney by whichthe products of combustion of the solid fuel are permitted to escape,thus utilizing substantially all the heat radiated from the outlet-pipe11.

In this description reference has only been made to. one burner; but twoor more may be placed Within the air-chamber surrounding the fire-pot,and one or all of them may be used, as the 'requirements of the case shadictate. In order to ignite the fluid fuel in these burners, I providean opening closed by a door through the casing opposite to where theburner 5 is situated and also a smaller opening 14. in the side of theburner itselfthrough which a lighted flame may be passed to cause theignition of the fluidfuel. The door 13 can be closed after the fluidfuel is ignited; but the opening 14; in the burner 5 need not be closed,for the reason that the draft incident tothe consumption of the fluidfuel Within the burner will draw air into the burner and thereby preventthe escape of fumes into the register-pipes from the fluidfuel burner.These burners 5 are preferably made in the arc of a circle to correspondto the general contour of the air-space surrounding the fire-pot 4. Allthe support that is generally necessary for the burner 5 is theinlet-pipe 7 and the outlet-pipe 11, as the burners are made of thinmetal and are not heavy, their only purpose being to carry ofl the fumesdu j to the ignition of the fluid fuel.

What claim, and desire to secure by Letters Patent; is

1. The combination in a device of the class designated, of asolid-fuel-combustion chamber of a furnace arranged to heat air, acasing inclosing said solid-fuel-combustion chamber andcooperatingtherewith to form an airheating-space, a fluid fuel burnerarranged withinsaid' air-heating space between said'solid-fuel-combustion chamber and casing and an independent off-takeflue to carry away the products of combustion from said fluid-fuelburner.

2. 'In a device of the class designated, the combination with a solidfuel combustion chamber havingan off-take flue, a casing surroundingsaid combustion-chamber, a fluidfuel burner placed between saidcombustionchamber and said casing, and means independent of saidoff-take flue for the escape of the products of combustion from saidburner.

3. The combination in a device of the class designated, of asolid-fuel-combnstion chamber, an inclosing casing surrounding saidcombustion chamber and separate therefrom, a fluid-fuel burner arrangedbetween the two, an inlet .to said burner for fluid fuel, and a separateoutlet for the escape of the products of combustion from said burner,said inlet and outlet forming a support for said burner.

4. In a device of the class designated, the combination withacombustion-chamber having an off-take flue, a casing surrounding'saidcombustion-chamber, a fluid-fuel burner arranged within the spacebetween said chamber and easing, baflie-plates in said burner to causethe backward and forward movement of the products of combustion while insaid burner, and'means independent of said offtake flue for the escapeof the products of combustion from said burner. V g

In testimony that I claim the above I hereunto set my hand in thepresence of two subscribing Witnesses.

CHARLES A. GIFFORD. In presence of G. E. HUMIHREY, MAUDE ZWISLER.

